<template>
  <div>
    <!-- 面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-row>
      <el-col><el-button type="primary" @click="addDialogVisible = true">添加角色</el-button></el-col>
    </el-row>

    <el-table :data="rolesList" style="width: 100%" border stripe>

      <el-table-column type="expand" label="*">
        <template v-slot="scope">
          <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['bdbottom', {bdtop: i1 === 0}]">

            <el-col :span="5">
              <el-tag closable  @close="removeRightsById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>

            <el-col :span="19">
              <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="[{bdtop: i2 != 0}]">

                <el-col :span="6">
                  <el-tag type="success" closable  @close="removeRightsById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>

                <el-col :span="18">
                  <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable
                        @close="removeRightsById(scope.row, item3.id)">
                    {{ item3.authName }}
                  </el-tag>
                </el-col>

              </el-row>
            </el-col>

          </el-row>
        </template>
      </el-table-column>

      <el-table-column type="index" label="#"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" width="300" v-slot="scope">
        <template v-show="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini" @click="editDialog(scope.row.id)">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoles(scope.row.id)">删除</el-button>
          <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightsDialog(scope.row)">分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 创建角色的对话框-->
    <el-dialog title="创建角色" :visible.sync="addDialogVisible" width="40%" @close="addDialogClosed">
      <el-form :model="addRolesForm" :rules="RolesFormRules" ref="addRolesFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName"><el-input v-model="addRolesForm.roleName"></el-input></el-form-item>

        <el-form-item label="角色描述" prop="roleDesc"><el-input v-model="addRolesForm.roleDesc"></el-input></el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色的对话框-->
    <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="40%" @close="editDialogClosed">
      <el-form :model="editRolesForm" :rules="RolesFormRules" ref="editRolesFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName"><el-input v-model="editRolesForm.roleName"></el-input></el-form-item>

        <el-form-item label="角色描述" prop="roleDesc"><el-input v-model="editRolesForm.roleDesc"></el-input></el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框-->
    <el-dialog title="分配权限" :visible.sync="setRightsDialogVisible" width="50%" @close="defKeys = []">

      <el-tree :data="rightsList" :props="{children: 'children', label: 'authName'}" show-checkbox
            node-key="id" default-expand-all
            :default-checked-keys="defKeys"
            ref="treeRef">

      </el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="setRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      rolesList: [],
      addRolesForm: {},
      editRolesForm: {},
      rightsList: [],
      defKeys: [],
      roleId: '',
      RolesFormRules: {
        roleName: [{ required: true, message: '请输入角色名', trigger: 'blur' }, { min: 2, max: 10, message: '长度应在 2 到 10 个字符之间', trigger: 'blur' }],
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }, { min: 1, max: 20, message: '长度应在 1 到 20 个字符之间', trigger: 'blur' }]
      },
      addDialogVisible: false,
      editDialogVisible: false,
      setRightsDialogVisible: false
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('请求角色列表失败！')
      this.rolesList = res.data
    },
    addDialogClosed () {
      this.$refs.addRolesFormRef.resetFields()
    },
    editDialogClosed () {
      this.$refs.editRolesFormRef.resetFields()
    },
    addRoles () {
      this.$refs.addRolesFormRef.validate(async valid => {
        if (!valid) return this.$message.error('创建角色失败！')
        const { data: res } = await this.$http.post('roles', {
          roleName: this.addRolesForm.roleName,
          roleDesc: this.addRolesForm.roleDesc
        })
        if (res.meta.status !== 201) return this.$message.error('创建角色失败！')
        this.$message.success('创建角色成功')
        this.addDialogVisible = false
        this.getRolesList()
      })
    },
    async removeRoles (id) {
      const confirmResult = await this.$confirm('此操作将永久删除角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        this.$message.info('已取消删除')
      } else {
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) return this.$message.error('删除用户失败！')
        this.$message.success('删除用户成功了')
        this.getRolesList()
      }
    },
    async removeRightsById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久取消角色授权, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        this.$message.info('已取消删除')
      } else {
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) return this.$message.error('取消角色授权失败！')
        this.$message.success('取消角色授权成功了')
        role.children = res.data
      }
    },
    async editDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询用户信息失败！')
      this.editRolesForm = res.data
      this.editDialogVisible = true
    },
    async editRoles () {
      this.$refs.editRolesFormRef.validate(async valid => {
        if (!valid) return this.$message.error('编辑角色失败！')
        const { data: res } = await this.$http.put('roles/' + this.editRolesForm.roleId, {
          roleName: this.editRolesForm.roleName,
          roleDesc: this.editRolesForm.roleDesc
        })
        if (res.meta.status !== 200) return this.$message.error('编辑角色失败！')
        this.editDialogVisible = false
        this.$message.success('编辑角色成功')
        this.getRolesList()
      })
    },
    async showSetRightsDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败！')
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      this.setRightsDialogVisible = true
    },
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    async setRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配权限失败！')
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightsDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped="scoped">
  .el-tag {
    margin: 10px;
  }
  .bdtop {
    border-top: 1px solid #eee;
  }
  .bdbottom {
    border-bottom: 1px solid #eee;
  }
  .el-row {
    display: flex;
    align-items: center;
  }
</style>
